@article{ZellerVirchow2024, author = {Zeller, Michael C. and Virchow, Fabian}, title = {Far-right leadership in comparison: shifts and continuities in German-speaking movements}, series = {Social Movement Studies}, journal = {Social Movement Studies}, publisher = {Informa}, issn = {1474-2837}, doi = {10.1080/14742837.2024.2430974}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-50521}, pages = {1 -- 23}, year = {2024}, abstract = {Leadership has long been acknowledged as a crucial feature of social movement activity. Theorisation has delved into the types of leadership and, more recently, the activities performed by leaders. However, comparative research on leadership and detection of any changes over time is scant. Our paper attends to these tasks by looking at the activities of two German-speaking far-right leaders. For many years, Christian Worch was one of the most active and influential neo-Nazi leaders in Germany, communicating much of his activity and strategy in the mid-2000s through a regular circular (Rundbriefe). Similarly, Martin Sellner, both as leader of the Identitarian movement and independent activist, today exercises an outsized role in the German-speaking far-right scene, including through his regular publications in the magazines Compact and Sezession. Our paper uses data of Worch's and Sellner's writings, scraped from webpages and gathered from archives, in a mixed-methods comparative design to identify the tasks performed by these leaders, and how frequently. Quantitative text analysis techniques guide the qualitative evaluation of leaders' activities and reveal shifts - and continuities - in far-right movement leadership. The paper thereby contributes to scholarship on an important aspect of contemporary far-right movements as well as broader social movement literature on the topic of leadership.}, subject = {Rechtsradikalismus}, language = {en} } @article{YuwonoSchwungSchwung2025, author = {Yuwono, Steve and Schwung, Dorothea and Schwung, Andreas}, title = {Automated leaders and followers selection in Stackelberg games for modular manufacturing systems}, series = {Journal of Intelligent Manufacturing}, journal = {Journal of Intelligent Manufacturing}, publisher = {Springer Nature}, issn = {0956-5515}, doi = {10.1007/s10845-025-02650-0}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-57990}, year = {2025}, abstract = {We propose an automated data-driven mechanism to evaluate each actuator's influence on modular manufacturing system objectives. This mechanism enables automated leader and follower selection in Stackelberg games, which have gained traction in engineering. While leaders typically hold greater priority or influence, systematic methods for assigning leaders and followers remain limited, especially in large-scale applications. As a result, many rely on empirical analysis to assign leaders and followers, without confirming if the selected setup is optimal. Therefore, in this paper, we develop an automated mechanism to evaluate the influence of each player on the global objectives of modular manufacturing systems, applicable to both single- and multi-objective scenarios. We validate the proposed approach within an industrial control scenario, using a modular Bulk Good System and its larger-scale arrangement with sequential and serial-parallel processes. We focus on three objectives, including production flow disruption prevention, power consumption reduction, and production demand fulfilment. Finally, we implement a self-learning algorithm utilizing Modular State-based Stackelberg Games, where leaders and followers are selected using our approach, which leads to encouraging results.}, subject = {Industrie 4.0}, language = {en} } @article{YuwonoHussainSchwungetal.2025, author = {Yuwono, Steve and Hussain, Ahmar Kamal and Schwung, Dorothea and Schwung, Andreas}, title = {Self-optimization in distributed manufacturing systems using Modular State-based Stackelberg games}, series = {Journal of Manufacturing Systems}, volume = {80}, journal = {Journal of Manufacturing Systems}, publisher = {Elsevier}, issn = {0278-6125}, doi = {10.1016/j.jmsy.2025.03.025}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-55471}, pages = {578 -- 594}, year = {2025}, abstract = {In this study, we introduce Modular State-based Stackelberg Games (Mod-SbSG), a novel game structure developed for distributed self-learning in modular manufacturing systems. Mod-SbSG enhances cooperative decision-making among self-learning agents within production systems by integrating State-based Potential Games (SbPG) with Stackelberg games. This hierarchical structure assigns more important modules of the manufacturing system a first-mover advantage, while less important modules respond optimally to the leaders' decisions. This decision-making process differs from typical multi-agent learning algorithms in manufacturing systems, where decisions are made simultaneously. We provide convergence guarantees for the novel game structure and design learning algorithms to account for the hierarchical game structure. We further analyse the effects of single-leader/multiple-follower and multiple-leader/multiple-follower scenarios within a Mod-SbSG. To assess its effectiveness, we implement and test Mod-SbSG in an industrial control setting using two laboratory-scale testbeds featuring sequential and serial parallel processes. The proposed approach delivers promising results compared to the vanilla SbPG, which reduces overflow by 97.1\%, and in some cases, prevents overflow entirely. Additionally, it decreases power consumption by 5\%-13\% while satisfying the production demand, which significantly improves potential (global objective) values.}, subject = {Intelligente Fertigung}, language = {en} } @article{YalcınkayaDurmazTepeetal.2024, author = {Yal{\c{c}}{\i}nkaya, Orhan and Durmaz, Ufuk and Tepe, Ahmet {\"U}mit and Benim, Ali Cemal and Uysal, {\"U}nal}, title = {Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array}, series = {Energies}, volume = {17}, journal = {Energies}, number = {5}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en17051238}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46387}, pages = {21}, year = {2024}, abstract = {The main purpose of this investigation was to explore the heat transfer and flow characteristics of aero-foil-shaped fins combined with extended jet holes, specifically focusing on their feasibility in cooling turbine blades. In this study, a comprehensive investigation was carried out by applying impinging jet array cooling (IJAC) on a semi-circular curved surface, which was roughened using aerofoil-shaped fins. Numerical computations were conducted under three different Reynolds numbers (Re) ranging from 5000 to 25,000, while nozzle-to-target surface spacings (S/d) ranged from 0.5 to 8.0. Furthermore, an assessment was made of the impact of different fin arrangements, single-row (L1), double-row (L2), and triple-row (L3), on convective heat transfer. Detailed examinations were performed on area-averaged and local Nusselt (Nu) numbers, flow properties, and the thermal performance criterion (TPC) on finned and smooth target surfaces. The study's results revealed that the use of aerofoil-shaped fins and the reduction in S/d, along with surface roughening, led to significant increases in the local and area-averaged Nu numbers compared to the conventional IJAC scheme. The most notable heat transfer enhancement was observed at S/d = 0.5 utilizing extended jets and the surface design incorporating aerofoil-shaped fins. Under these specific conditions, the maximum heat transfer enhancement reached 52.81\%. Moreover, the investigation also demonstrated that the highest TPC on the finned surface was achieved when S/d = 2.0 for L2 at Re = 25,000, resulting in a TPC value of 1.12. Furthermore, reducing S/d and mounting aerofoil-shaped fins on the surface yielded a more uniform heat transfer distribution on the relevant surface than IJAC with a smooth surface, ensuring a relatively more uniform heat transfer distribution to minimize the risk of localized overheating.}, subject = {Beschaufelung}, language = {en} } @article{WolfUlrichBraun2023, author = {Wolf, Dominik Werner and Ulrich, Markus and Braun, Alexander}, title = {Novel developments of refractive power measurement techniques in the automotive world}, series = {Metrologia}, volume = {60}, journal = {Metrologia}, number = {064001}, publisher = {IOP Publishing}, issn = {1681-7575}, doi = {10.1088/1681-7575/acf1a4}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41484}, year = {2023}, abstract = {Refractive power measurements serve as the primary quality standard in the automotive glazing industry. In the light of autonomous driving new optical metrics are becoming more and more popular for specifying optical quality requirements for the windshield. Nevertheless, the link between those quantities and the refractive power needs to be established in order to ensure a holistic requirement profile for the windshield. As a consequence, traceable high-resolution refractive power measurements are still required for the glass quality assessment. Standard measurement systems using Moir{\´e} patterns for refractive power monitoring in the automotive industry are highly resolution limited, wherefore they are insufficient for evaluating the camera window area. Consequently, there is a need for more sophisticated refractive power measurement systems that provide a higher spatial resolution. In addition, a calibration procedure has to be developed in order to guarantee for comparability of the measurement results. For increasing the resolution, a measurement setup based on an auto-correlation algorithm is tested in this paper. Furthermore, a calibration procedure is established by using a single reference lens with a nominal refractive power of 100 km-1. For the calibration of the entire measurement range of the system, the lens is tilted by an inclination angle orthogonal to the optical axis. The effective refractive power is then given by the Kerkhof model. By adopting the measurement and calibration procedure presented in this paper, glass suppliers in the automotive industry will be able to detect relevant manufacturing defects within the camera window area more accurately paving the way for a holistic quality assurance of the windshield for future advanced driver-assistance system (ADAS) functionalities. Concurrently, the traceability of the measurement results is ensured by establishing a calibration chain based on a single reference lens, which is traced back to international standards.}, language = {en} } @article{WojciechowskiPogscheba2022, author = {Wojciechowski, Manfred and Pogscheba, Patrick}, title = {Building a COVID-Safe Navigation App Using a Meta-Model Based Context Server}, series = {sensors}, volume = {22}, journal = {sensors}, number = {24}, publisher = {MDPI}, issn = {1424-8220}, doi = {10.3390/s22249890}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-39570}, pages = {1 -- 14}, year = {2022}, abstract = {Building context-aware applications is an already widely researched topic. It is our belief that context awareness has the potential to supplement the Internet of Things, when a suitable methodology including supporting tools will ease the development of context-aware applications. We believe that a meta-model based approach can be key to achieving this goal. In this paper, we present our meta-model based methodology, which allows us to define and build application-specific context models and the integration of sensor data without any programming. We describe how that methodology is applied with the implementation of a relatively simple context-aware COVID-safe navigation app. The outcome showed that programmers with no experience in context-awareness were able to understand the concepts easily and were able to effectively use it after receiving a short training. Therefore, context-awareness is able to be implemented within a short amount of time. We conclude that this can also be the case for the development of other context-aware applications, which have the same context-awareness characteristics. We have also identified further optimization potential, which we will discuss at the conclusion of this article.}, language = {en} } @article{WohlersMuellerBraun2022, author = {Wohlers, Luis Constantin and M{\"u}ller, Patrick and Braun, Alexander}, title = {Original image noise reconstruction for spatially-varying filtered driving scenes}, series = {Electronic Imaging: Society for Imaging Science and Technology}, volume = {34}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {16}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2022.34.16.AVM-214}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41479}, pages = {1 -- 7}, year = {2022}, language = {en} } @article{WittpahlDeeganBlacketal.2021, author = {Wittpahl, Christian and Deegan, Brian and Black, Bob and Braun, Alexander}, title = {An analytic-numerical image flicker study to test novel flicker metrics}, series = {Electronic Imaging: Society for Imaging Science and Technology}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {17}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/ISSN.2470-1173.2021.17.AVM-183}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-35671}, pages = {1 -- 8}, year = {2021}, language = {en} } @article{WinterDiehlTelaaretal.2024, author = {Winter, Franziska Luise and Diehl, Patrick and Telaar, Pascal and Watermann, Clara Maria and Kaluza, Stefan and Muhler, Martin and Apfel, Ulf-Peter and Zeidler-Fandrich, Barbara}, title = {Influence of the catalyst precursor for cobalt on activated carbon applied in ammonia decomposition}, series = {Catalysis Today}, volume = {429}, journal = {Catalysis Today}, publisher = {Elsevier}, issn = {0920-5861}, doi = {10.1016/j.cattod.2023.114502}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46600}, pages = {9}, year = {2024}, abstract = {Ammonia is a key compound for storing and transporting green hydrogen. However, the efficient release of stored hydrogen through thermocatalytic ammonia decomposition is achievable only at temperatures around 600 °C, particularly with non-noble metal-based catalysts, which prove to be both ecologically and economically more feasible. In this study, electrically conductive activated carbon was selected as the catalyst support, chosen specifically for its suitability in achieving more energy-efficient direct reactor heating through the ohmic resistance of the catalysts. Cobalt salts were wet impregnated on activated carbon investigating the influence of different precursors (cobalt nitrate and cobalt acetate) and pyrolysis temperatures (400 °C and 600 °C) under N2 flow on the cobalt particle size and the incorporation of cobalt into the carbon matrix. TEM imaging and CO-chemisorption revealed well dispersed cobalt particles with sizes below 10 nm for the catalysts synthesized from the cobalt nitrate precursor. On the other hand, cobalt acetate led to about nine times larger Co agglomerates, which were partially detached from the carbon matrix. Moreover, this substantial difference in the Co particle size results in a significantly higher ammonia conversion for cobalt nitrate-based catalysts, achieving 94 \% of ammonia conversion at 600 °C. Furthermore, the long-term stability test of the cobalt nitrate-based catalyst resulted in a slight deactivation of only 2 \% ammonia conversion at 500 °C.}, subject = {Katalyse}, language = {en} } @article{WeinzierlLepaAckermann2018, author = {Weinzierl, Stefan and Lepa, Steffen and Ackermann, David}, title = {A measuring instrument for the auditory perception of rooms: The Room Acoustical Quality Inventory (RAQI)}, series = {The Journal of the Acoustical Society of America}, volume = {144}, journal = {The Journal of the Acoustical Society of America}, number = {3}, publisher = {Acoustical Society of America}, issn = {0001-4966}, doi = {10.1121/1.5051453}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-58954}, pages = {1245 -- 1257}, year = {2018}, abstract = {With the Room Acoustical Quality Inventory (RAQI), a measuring instrument for the perceptual space of performance venues for music and speech has been developed. First, a focus group with room acoustical experts determined relevant aspects of room acoustical impression in the form of a comprehensive list of 50 uni- and bipolar items in different categories. Then, n = 190 subjects rated their acoustical impression of 35 binaurally simulated rooms from 2 listening positions, with symphonic orchestra, solo trumpet, and dramatic speech as audio content. Subsequent explorative and confirmative factor analyses of the questionnaire data resulted in three possible solutions with four, six, and nine factors of room acoustical impression. The factor solutions, as well as the related RAQI items, were tested in terms of reliability, validity, and several types of measurement invariance, and were cross-validated by a follow-up experiment with a subsample of 46\% of the original participants, which provided re-test reliabilities and stability coefficients for all RAQI constructs. The resulting psychometrically evaluated measurement instrument can be used for room quality assessment, acoustical planning, and the further development of room acoustical parameters in order to predict primary acoustical qualities of venues for music and speech.}, language = {en} } @article{WeberHewelingFischeretal.2017, author = {Weber, Konradin and Heweling, Georg and Fischer, Christian and Lange, Martin}, title = {The use of an octocopter UAV for the determination of air pollutants - a case study of the traffic induced pollution plume around a river bridge in Duesseldorf, Germany}, series = {International Journal of Environmental Science}, volume = {2}, journal = {International Journal of Environmental Science}, issn = {2367-8941}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-50805}, pages = {63 -- 66}, year = {2017}, abstract = {Emissions of air pollutants from the road traffic are still a major problem in Germany. It is well known that traffic induced fine particulate matter (PM10, PM2.5, PM1), ultrafine particles (UFPs) and gaseous air pollutants, like e.g. NOx, are adverse to human health. Therefore it is important to monitor these air pollutants in the cities. In this study an octocopter UAV is used as a carrier for measurement systems for UFPs, fine particulate matter and soot. This instrumented octocopter was used for studying the vertical and horizontal variation of the air pollution plume, which originated from the traffic on a river bridge, connecting two parts of Duesseldorf in Germany. This octocopter UAV had been especially designed and built at the Duesseldorf University of Applied Sciences for measurements of air pollutants. It was featuring eight 900 W electric propeller drives and was equipped with a pixhawk flight control. Its lift off weight was about 10.5 kg. About 60 measurement flights were performed by the instrumented octocopter throughout this study. These measurement flights could clearly determine the traffic induced air pollution plume originating from the bridge. Moreover, the dispersion of UFPs within the pollution plume could be monitored with the octocopter flights.}, subject = {Flugk{\"o}rper}, language = {en} } @article{WeberFischerPohletal.2015, author = {Weber, Konradin and Fischer, Christian and Pohl, Tobias and B{\"o}hlke, Christoph and Lange, Martin and Scharifi, Emad and Eliasson, Jonas and Yoshitani, Junichi}, title = {The Application of Light Research Aircraft for the Investigation of Volcano Eruption Plumes, Industrial Emissions and Urban Plumes}, series = {WSEAS Transactions on Environment and Development}, volume = {11}, journal = {WSEAS Transactions on Environment and Development}, publisher = {WSEAS}, issn = {2224-3496}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-50892}, pages = {89 -- 94}, year = {2015}, abstract = {Airborne measurements have proved to be an important tool for the investigation of volcanic emission plumes, industrial pollution plumes, fugitive emissions and urban pollution plumes. In this paper several examples are demonstrated, how these investigations can be performed by light and microlight propeller aircraft. Throughout the last years innovative aircraft were developed in the light and microlight class showing an excellent flight performance. This enables airborne measurements, which were performed in former years normally by big jet engine driven research aircraft. Moreover, these light and microlight aircraft are equipped with piston motors, which are sturdy enough to operate even in adverse and harsh flight conditions, e.g. in volcanic plumes with high ash concentration. Additionally, turbo charged versions of these airborne piston motors are available, which allow flight altitudes of 7000m - 9000m enabling a large variety of research missions. Another advantage of light and microlight research aircraft is that they are quite cost effective and have a comparatively short certification process for the installation of new measurement equipment. This made it possible to respond fast to the eruption of the Icelandic volcano Eyjafjallaj{\"o}kull 2010 and Grimsv{\"o}tn 2011 with research flights in volcanic ash plumes over Germany and Iceland. In this way it was possible to deliver real airborne measurements additional to the ash plume model calculations of the London Volcanic Ash Advisory Center (VAAC). In this paper examples of airborne measurements in the volcanic plumes of the recent eruptions of Icelandic volcanoes are given. Moreover examples are presented, which highlight the outstanding capabilities of these aircraft for pinpointing industrial emissions and for characterizing urban pollution plumes.}, subject = {Vulkanismus}, language = {en} } @article{VoeckingKarrenbrockBeckmannetal.2024, author = {V{\"o}cking, Mara and Karrenbrock, Anne and Beckmann, Andreas and Vondeberg, Carmen and Obert, Laura and Hemming, Bernhard and Minartz, Peter and Bleck, Christian and C{\"u}rlis, Diana and Kuske, Silke}, title = {Emotional and Psychological Safety in Healthcare Digitalization: A Design Ethnographic Study}, series = {International Journal of Public Health}, volume = {69}, journal = {International Journal of Public Health}, publisher = {Frontiers}, issn = {1661-8564}, doi = {10.3389/ijph.2024.1607575}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46556}, year = {2024}, abstract = {Emotional and psychological safety is important during the use of digital technologies in healthcare. We aimed to gain comprehensive insight into needs, influencing factors and outcomes in the context of perceived safety and digital technologies in healthcare. We employed a participatory, design ethnographic research approach with 16 participants in 10 use cases. The methods included in an iterative process were, think-aloud, guideline-based interviews, process mapping, storyboard creation, and photo documentation. A qualitative, primarily inductive data analysis and synthesis was performed. Perceived safety is influenced by various factors and unmet needs. Increased perceived safety can positively support the use of digital technologies, whereas low perceived safety can limit or even hinder its use. The needs of the different target groups should be considered throughout the entire process of digital technology development and healthcare provision to support their implementation. These findings support further research by providing specific aspects of emotional and psychological safety regarding target groups, settings, and ages and those with different levels of affinity for digital technologies.}, subject = {Digitalisierung}, language = {en} } @article{vonBergWolfSteffens2024, author = {von Berg, Markus and Wolf, Anna-Christina and Steffens, Jochen}, title = {Age- and Sex-Related Differences in Music Requests on a Radio Show for Children}, series = {Music \& Science}, volume = {7}, journal = {Music \& Science}, publisher = {Sage Publications}, issn = {2059-2043}, doi = {10.1177/20592043241288335}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46588}, pages = {1 -- 16}, year = {2024}, abstract = {In research on the development of musical preferences, children are often asked either to evaluate musical pieces that have been previously selected by adult experimenters, or to give self-reports on preferences for different musical styles. This study involved analyzing a sample of 1,412 freely and publicly expressed music requests from children aged between 4 and 11 years taken from a German radio program, with regard to age- and sex-specific differences. The music was categorized into genres, as listed on Spotify, and examined using methods of music information retrieval provided by the Spotify Developer application programming interface. Results showed that, at younger ages, the requests were generally more evenly distributed across different genres. Regarding single genres, we observed small positive relationships between age and the likelihood of requesting the genres pop or electro and small negative relationships between age and the likelihood of requesting A capella, German songwriter, indie, theme songs, or children's music. Furthermore, we found that boys requested significantly more rock or hip-hop, whereas girls had a higher tendency to ask for pop. Finally, age- (but no sex-) related differences regarding the Spotify features of valence and liveness of the requested music were found, which were related to the preference for children's music at younger ages. The results thus suggest that previous findings regarding differences between boys and girls and an increasing formation of distinct genre preferences during infancy also apply to single song requests made on a radio show.}, language = {en} } @article{vonBergHimmeleinSteffens2024, author = {von Berg, Markus and Himmelein, Hendrik and Steffens, Jochen}, title = {Effects of noise sensitivity and listening effort on perceptual ratings of background noise}, series = {JASA Express Letters}, volume = {8}, journal = {JASA Express Letters}, number = {4}, publisher = {AIP Publishing}, issn = {2691-1191}, doi = {10.1121/10.0028201}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-45747}, pages = {7}, year = {2024}, abstract = {Previous research suggests that noise sensitivity is related to inefficient auditory processing that might increase the mental load of noise and affect noise evaluation. This assumption was tested in an experiment using a dual-task paradigm with a visual primary task and an auditory secondary task. Results showed that participants' noise sensitivity was positively correlated with mental effort. Furthermore, mental effort mediated the effect of noise sensitivity on loudness and unpleasantness ratings. The results thus support the idea that noise sensitivity is related to increased mental effort and difficulties in filtering auditory information and that situational factors should be considered.}, language = {en} } @article{VersuemerSteffensWeinzierl2023, author = {Vers{\"u}mer, Siegbert and Steffens, Jochen and Weinzierl, Stefan}, title = {Day-to-day loudness assessments of indoor soundscapes: Exploring the impact of loudness indicators, person, and situation}, series = {The Journal of the Acoustical Society of America}, volume = {153}, journal = {The Journal of the Acoustical Society of America}, number = {5}, publisher = {Acoustical Society of America (ASA)}, issn = {0001-4966}, doi = {10.1121/10.0019413}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46127}, pages = {2956 -- 2972}, year = {2023}, abstract = {This study investigates loudness perception in real-world contexts using predictors related to the sound, situation, or person. In the study, 105 participants recorded 6594 sound environments in their homes, which were then evaluated based on the Experience Sampling Method. Hierarchical linear regressions using a loudness level based on ISO 532-1 allowed for obtaining the best model fits for predicting perceived loudness and explaining the highest variance. LAeq and LAF5 provided comparable results and may require less computational effort. However, the analysis shows that only one-third of the variance explained by fixed effects was attributable to the loudness level. Sixteen percent stemmed from perceived properties of the soundscape; 1\% were attributable to relatively temporally stable, person-related predictors like participants' age; non-auditory situational predictors made no additional contribution. The results thus did not confirm previous findings on loudness perception under laboratory conditions, emphasizing the importance of the situational context. Along with the current paper, a comprehensive dataset, including the assessed person-related, situational, and sound-related measures as well as LAeq time-series and third-octave spectrograms, is provided to enable further research on sound perception, indoor soundscapes, and emotion.}, subject = {Lautwahrnehmung}, language = {en} } @article{VersuemerSteffensBlaettermannetal.2020, author = {Vers{\"u}mer, Siegbert and Steffens, Jochen and Bl{\"a}ttermann, Patrick and Becker-Schweitzer, J{\"o}rg}, title = {Modelling evaluations of low-level sounds in everyday situations using linear machine learning for variable selection}, series = {Frontiers in Psychology}, volume = {11}, journal = {Frontiers in Psychology}, publisher = {Frontiers}, issn = {1664-1078}, doi = {10.3389/fpsyg.2020.570761}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-23779}, year = {2020}, language = {en} } @article{VersuemerBlaettermannRosenthaletal.2025, author = {Vers{\"u}mer, Siegbert and Bl{\"a}ttermann, Patrick and Rosenthal, Fabian and Weinzierl, Stefan}, title = {A comparison of methods for modeling soundscape dimensions based on different datasets}, series = {The Journal of the Acoustical Society of America}, volume = {157}, journal = {The Journal of the Acoustical Society of America}, number = {1}, publisher = {AIP Publishing}, issn = {1520-8524}, doi = {10.1121/10.0034849}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-48849}, pages = {234 -- 255}, year = {2025}, abstract = {Soundscape studies vary considerably in study design, statistical methods, and model fit metrics used. Due to this confounding of data and methods, it is difficult to assess the suitability of statistical modelling techniques used in the literature. Therefore, five different methods and two performance metrics were applied to three existing soundscape datasets to model soundscape Pleasantness and Eventfulness based on seven acoustic and three sociodemographic predictors. Datasets differed in soundscape type (urban outdoor vs indoor), experimental setting (field- vs lab-based), size, and study design (site- vs person-centered). The fixed-effects and mixed-effects methods ranged from linear to nonlinear regression based on advanced machine learning approaches. Results showed that models performed better for Eventfulness than for Pleasantness in most cases, while performance as measured by the out-of-sample R2 was dependent on the total variance of the target, especially in both field studies with imbalanced targets and groups. Nonlinear methods consistently outperformed linear regression, with random forest and extreme gradient boosting performing particularly well, while the performance levels of all nonlinear methods remained comparable. Mixed-effects models provided a more generalized, albeit slightly smaller prediction performance when tested on unknown groups. Finally, this study motivates the use of cross-validation with special splitting for analyzing small imbalanced datasets.}, subject = {Akustische Eigenschaft}, language = {en} } @article{VanRiessenThissenKnopp2023, author = {Van Rießen, Anne and Thissen, Julia and Knopp, Reinhold}, title = {A note on the D{\"u}sseldorfer Model for counting homeless people in a German city}, series = {International Journal of Population Studies}, volume = {9}, journal = {International Journal of Population Studies}, number = {1}, publisher = {AccScience}, issn = {2424-8606}, doi = {10.36922/ijps.397}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46647}, pages = {58 -- 68}, year = {2023}, abstract = {This article describes the D{\"u}sseldorfer Model which was developed for the city's homeless census in 2021. It allows focusing on the number as well as living situations of homeless people with the objective of analyzing their needs to derive concrete recommendations for action. A complete quantitative count of homeless people in the city on a key date was performed according to principles developed together with the actors of the homeless support system in D{\"u}sseldorf. Beyond that, qualitative interviews afforded insights into the living situation of homeless people from the user's perspective. Along with the research methodology, major results are briefly presented in the article, followed by an outlook with recommendations for action.}, subject = {Obdachlosigkeit}, language = {en} } @article{ThuemmlerEngelBartz2022, author = {Th{\"u}mmler, Ramona and Engel, Eva-Maria and Bartz, Janieta}, title = {Strengthening Emotional Development and Emotion Regulation in Childhood—As a Key Task in Early Childhood Education}, series = {International Journal of Environmental Research and Public Health}, volume = {19}, journal = {International Journal of Environmental Research and Public Health}, number = {7}, publisher = {MDPI}, issn = {1660-4601}, doi = {10.3390/ijerph19073978}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46655}, pages = {11}, year = {2022}, abstract = {The following article deals with emotional development and the development of emotion regulation skills in children during early childhood education, focusing primarily on the importance of the early childhood teacher. Emotion regulation is important for success and wellbeing in further life. It is developed in interaction with parents as attachment figures. Teachers can also be important persons for the child in the context of bonding. This leads to the question of how early childhood teachers can support children learning to regulate their emotions. We analyze with the content analysis, four programs for promoting social and emotional skills that are currently used in Germany. The main question is if the programs include elements that increase teachers' skills in supporting the children in regulating their emotions. The categories to analyze the programs are derived from theories of teacher-child interaction. In addition to programs for promoting emotional and social development, we will discuss aspects of shaping interaction as essential elements in promoting emotion regulation. The conclusion outlines some key implications for educational practice and the importance of developing professional behavior for qualitative teacher-child interactions.}, subject = {Emotionsregulation}, language = {en} }